This moment:
When you have a weired exception, start googling it and practically bruteforcing all possible solutions you know of and/or found on stackoverflow.

Then after (half) an hour just starting from the beginning, attempting the simplest solution you can think of and it just works on the first attempt:

😱 ⏩ 😰 ⏩ 😤 ⏩ ☕ ⏩ 😥 ⏩ 😔

But you'll notice that you had learned a lot of this.
... Or maybe not 😜